OTL ENERGY, composed in 2015, tested, output power approximately 20W, but AUTHOR guarantees for 15w high definition on good box type ONKEN [96-99db] or Voice of the Teatre,, or some other high decibel box...akcent was on safety, especially for the protection of the box, and handling has only two switches, one for the network and the other for high voltage, [including after 3-4 minutes], for [preheating output tubes], Input tubes 6n6p and splitter ECC85, output 6c33 high quality, in terms of the stability of the current through the tube remains stable even after several hours of work, so remains to be connect the speakers and simply enjoy it,, regards theoretician
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